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annotate dwt/dwthelper/BufferedInputStream.d @ 156:969e7de37c3d default tip

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Fixes to get dwt to work with dmd and ldc
author Jacob Carlborg <doob@me.com>
date Wed, 08 Jul 2009 21:56:44 +0200
parents 380af2bdd8e5
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1 /**
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2 * Authors: Frank Benoit <keinfarbton@googlemail.com>
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3 */
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4 module dwt.dwthelper.BufferedInputStream;
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6 import dwt.dwthelper.InputStream;
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7 import dwt.dwthelper.utils;
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9 import tango.core.Exception;
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11 public class BufferedInputStream : dwt.dwthelper.InputStream.InputStream {
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13 alias dwt.dwthelper.InputStream.InputStream.read read;
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14
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15 private const int defaultSize = 8192;
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16 protected byte[] buf;
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17 protected int count = 0; /// The index one greater than the index of the last valid byte in the buffer.
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18 protected int pos = 0; /// The current position in the buffer.
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19 protected int markpos = (-1);
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20 protected int marklimit;
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21 dwt.dwthelper.InputStream.InputStream istr;
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23 public this ( dwt.dwthelper.InputStream.InputStream istr ){
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24 this( istr, defaultSize );
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25 }
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27 public this ( dwt.dwthelper.InputStream.InputStream istr, int size ){
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28 this.istr = istr;
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29 if( size <= 0 ){
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30 throw new IllegalArgumentException( "Buffer size <= 0" );
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31 }
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32 buf.length = size;
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33 }
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34
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35 private InputStream getAndCheckIstr(){
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36 InputStream res = istr;
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37 if( res is null ){
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38 throw new IOException( "Stream closed" );
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39 }
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40 return res;
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41 }
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42 private byte[] getAndCheckBuf(){
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43 byte[] res = buf;
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44 if( res is null ){
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45 throw new IOException( "Stream closed" );
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46 }
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47 return res;
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48 }
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49 private void fill(){
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50 assert( pos is count );
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51 pos = 0;
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52 count = 0;
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53 count = getAndCheckIstr().read( buf );
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54 if( count < 0 ){
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55 count = 0;
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56 istr = null;
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57 }
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58 }
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59 public synchronized int read(){
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60 if( pos >= count ){
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61 fill();
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62 if( pos >= count ){
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63 return -1;
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64 }
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65 }
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66 return getAndCheckBuf()[pos++] & 0xFF;
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67 }
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68
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69 public synchronized int read( byte[] b, int off, int len ){
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70 return super.read( b, off, len );
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71 }
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72
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73 public synchronized long skip( long n ){
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74 return this.istr.skip(n);
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75 }
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76
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77 public synchronized int available(){
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78 int istr_avail = 0;
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79 if( istr !is null ){
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80 istr_avail = istr.available();
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81 }
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82 return istr_avail + (count - pos);
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83 }
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84
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85 public synchronized void mark( int readlimit ){
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86 implMissing( __FILE__, __LINE__ );
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87 this.istr.mark( readlimit );
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88 }
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89
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90 public synchronized void reset(){
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91 implMissing( __FILE__, __LINE__ );
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92 this.istr.reset();
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93 }
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94
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95 public bool markSupported(){
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96 implMissing( __FILE__, __LINE__ );
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97 return false;
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98 }
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99
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100 public void close(){
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101 this.istr.close();
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102 }
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103
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104
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105 }
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